Design of time-delay-compensated grating monochromators for femtosecond pulses in the extreme-ultraviolet

It is presented the design of a compact time-delay-compensated monochromator (TDCM) to provide pulses with sub-10-fs temporal response. The TDCM has four optical elements: two gratings and two mirrors. The design has advantages in terms of costs, compactness, alignment robustness and throughput.